[@Cojemo]

Why not make the dance NP into an ability that prevents enemies from seeing her as 'hostile' even if shes fighting someone? That way PC won't drop during the fight, and it'll be really hard to attack her or defend against her. It would really mess with skills like eye of the mind or instinct because it'd kind of negate them. An excellent surprise attack ability however with just that I feel it isn't wholly complete so I think you should take that idea and run with it some.

Also, you should use Melt's Crime Ballet as an inspiration. Perhaps incorporate a similar dancing based ability into your sheet as a personal skill.